#1,047 – Setting the Size of a Grid’s Rows or Columns from Code

There are three ways to set the size of a row or a column in a Grid:

  • Auto – set height/width to fit the size of the contained element
  • numeric value – explicitly set height/width to specified number of device independent units (1/96th in)
  • * or n* – distribute remaining space proportionately

You can set row or column sizes from code for all three of these methods.

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            // Set to Auto
            myGrid.RowDefinitions[0].Height = GridLength.Auto;

            // Set explicit size
            myGrid.RowDefinitions[1].Height = new GridLength(35.0, GridUnitType.Pixel);

            // Set star sizing (proportional)
            myGrid.RowDefinitions[2].Height = new GridLength(1.0, GridUnitType.Star);
            myGrid.RowDefinitions[3].Height = new GridLength(2.0, GridUnitType.Star);
        }

Before clicking the button, the row heights default to “*” (evenly spaced):
1047-001
After executing the code shown above, the Grid looks like this:
1047-002

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

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